<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">

var a = [5];
var b = [5]
a.c = 10;
alert(b.c);
/*
var x = a;
var y = x;
y.c = 10;
alert(a.c);
*/
/*
function show(y){
	y.c = 10;
};
function show2(x){
	show.call(this,x);
};
new show2(a);
alert(a.c)
*/


</script>
</body>
</html>